Baffle for water-tube boilers



May 29; 1923.

E. KIDWELL BAFFLE FOR WATERTUBE BOILERS Filed 001:. 12 1920 H E alga/ 1f We Patented May 29, 1923.

] UNITED: STATES PATENT Janene irrnwnLL, or mrnwau znnwrsconsm, ASSIGNOB ro KIDWIELBQQlILER-I COMPANY, or MILWAUKEE, WISCONSIN, A .coaronarron or W sconsin.

IBAFFLE FOB WATER-TUBE BOILERS.

new and useful Improvements in Bafiles for Water-Tube Boilers, of-which the followin is a specification.

This invention relates to a baffle construction for boilers of the series drum and tube type wherein the water circulating path is constituted by a series of transverse drums and connecting banks of water tubes, having reference especially to the bafiie which is associated with the rear bank of water tubes.

Owing to the limited space between the.

curved portions of such tubes where they enter the drum, it has been customary to construct the upper part of the rear bafiie of a series of tiles placed edgewise one upon another, the uppermost tiles adjacent the drum being necessarily tapered or feathered to a relatively thin edge. The reduced edges of the tiles, being fragile, frequently crack and the tiles, in consequence, lie unsecurely on the tubes; and hence after a short time the movement of the boiler units, because of expansion, cracks the baffle tiles, loosens the joints therebetween, and permits short circuiting of the gases.

The object of my invention is to overcome the objection above-mentioned, and to that end I provide a rear baffle element comprising a lower tile portion and an upper metal portion, the latter being shaped to lie in the.

space between the curved upper portion of adjacent tubes of the rear'bank of tubes and embodying various novel features of construction which will be hereinafter described and claimed.

In the drawings- Figure 1 is a section of a part of a boiler embodying my improved baffie construction, showing the rear boiler drum and parts of a bank of water tubes extending downwardly from the drum.

Fig. 2 is a section, on a larger scale, of the baffle section and its connections.

Referring to the drawings, 5 designates a rear steam-and-water drum; 6 designates a rear bank of water tubes having curved upper ends entering the wall of the drum, and 7 a bank of tubes leading to said drum from Application filed October 12,1920. Serial N0.'4l6,3 94.

a forward drum (not shown I 8 designates one of the longitudinal girders which sup-, .port therdrum 5,-and' 9 designates a lower transverse "girder which supports the body 1 of the tile baffle 10 between two. adjacent rows (11) of the rear bank of. tubes. "The girders 8, 9 are supported "in the'boiler setting as usual.

As illustrated in the drawings the curved I upper portions of the two rows of tubesbetween which the rearbaflie is arranged converge as they approach and enter the drum, I

thus aflording but limited space adjacent the drum for the reception of the upper'end of the baffle. According to my invention, I

terminate the body of the'tile baffle '10 below the girder 8, and provide'a separate unit or section for the upper part of the baffle; This section, in its preferred form, comprises a metal plate'12 appropriately shaped to lie between adjacent rows of tubes, its

lower portion being bolted or otherwise secured to a basal bar 13 preferably of channel iron. This bar is disposed below the girder 8 and is adjustably secured thereto,

preferably by means of bolts 14 passing through the lower flanges of the girder, so that by proper manipulation of the bolts the metal section 12 canvbe vertically shifted in a manner to force its upper edge into close contact with the wall of the drum, thus securing the parts in close relation to each other.

The lower'end of the plate 12 depends be- I low the bar 13, thus providing an angular portion which receives the top of the uppermost tile of the bafiie portion 10, which portion is built up on the girder 9 as usual. The

joint between the contiguous bafile tile and the angular lower portion of the upper metal section can be cemented, if desired, after the I construction has been installed in the boiler structure.

Adjacent the upper end of the rear side of the metal section is secured an angle iron 15 which provides a seat for asbestos packing, as 16, which packing can thus by the described mode of adjustingthefbafie] section be crowded against the wall of the drum in order to ensure a tight joint under all conditions of service.

It is to be understood that do not limit y n ention 1 9 the details of construction herein disclosed, as the same may be modified within the principle of my invention and the scope of I the appended claims.

I claim- 1. In a boiler of the series drum and tube type, the combination witha rearward drum and arearwardebank of water tubes extending therefrom, of a battle element associated with said tubes, said element comprising a tile structure spaced below the drum and a metal member occupyinglthe space between said structure and the drum and shaped to 'lielinthe upper curved space between adjacentrows of tubes, a rigid support below the drum, and aconnection between said support andthe plate member for vertically adjusting said member to force itsvupper edge into close contact with the opposing wall of the drum.

2. In a boiler of the series drum and tube .type, the combination with a rearward drum and a rearward-bank of water tubes extendmg therefrom, of abafile element associated with said ,tubes, said element comprising a tile structurespaced below the drum and a metal member occupying the space between .said structure and the drum and shaped to lie in the upper curved space between adjacent rows 0f.tubes,.a rigid support below the drum, and a connection between said support and the plate member for vertically adjusting said member to force its upper edge into close contact witlrthe opposing wall of the drum, and means on said member, adjacent its upper edge, to receive andsupport packing against the wallof the drum.

3, In a boiler of the series drum and tube type, the combination with a rearward drum, a rearward bank of water tubes extending therefrom, and a supporting girder, of a baffle element associated with said tubes, said element comprising a lower tile structure terminating below the girder, and an 'upper metal structure occupying the space between the tile structure and the drum, said metal structure comprising a plate shaped to lie in the upper curved space between adjacent rows oftubes, a basal bar fast on said plate above the lower edge Qfthe latter, to provide an angular seatto receive the upper part of the tile structure, and an adjustable connection between the said bar and the girder.

Signed at Milwaukee, in the county, of

Milwaukee and State of l/Visconsin, this'Sth day of October A. 1920. EDGAR KIDWELL. 

